package T5;

public class StringDemo4 {

    public static void main(String[] args) {
        String s1="helloworld";
        // String replace(char old,char new)
//		String replace(String old,String new)
        String s2=s1.replace('l', 'k');
        String s3=s1.replace("owo", "ak47");
        System.out.println(s1);
        System.out.println(s2);
        System.out.println(s3);
        System.out.println("-----------");
//		去除字符串两端空格:String trim()
        String s4="  hello  world   ";
        String s5=s4.trim();
        System.out.println("s4:"+s4+"---");
        System.out.println("s5:"+s5+"---");
        System.out.println("-----------");

        //按字典顺序比较两个字符串
//		int compareTo(String str)
        String s6="hello";
        String s7="hello";
        String s8="abc";
        String s9="xyz";
        System.out.println(s6.compareTo(s7));
        System.out.println(s6.compareTo(s8));
        System.out.println(s6.compareTo(s9));
    }

}